Examine source code of Frozen blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Metallic Blue",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(41, 47, 64)",
      "toolbar_text": "rgb(245, 245, 245)",
      "frame": "rgb(191, 197, 214)",
      "tab_background_text": "rgb(10, 10, 10)",
      "toolbar_field": "rgb(26, 32, 51)",
      "toolbar_field_text": "rgb(245, 245, 245)",
      "tab_line": "rgb(106, 115, 139)",
      "popup": "rgb(41, 47, 64)",
      "popup_text": "rgb(245, 245, 245)",
      "tab_loading": "rgb(106, 115, 139)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f77f9e85-47ef-4df1-a21c-e7a5a1bc5494}"
    }
  }
}